diff --git a/HISTORY.rst b/HISTORY.rst
index a35eea41..570d69c2 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -4,6 +4,10 @@ Release History
 2.2.1 (2015-??-??)
 ------------------
 
+* Project generator for `CLion IDE <http://docs.platformio.org/en/latest/ide/clion.html>`__
+  (`issue #132 <https://github.com/platformio/platformio/issues/132>`_)
+* Updated ``tool-bossac`` package to 1.5 version for `atmelsam <http://docs.platformio.org/en/latest/platforms/atmelsam.html>`__ platform
+  (`issue #251 <https://github.com/platformio/platformio/issues/251>`_)
 * Fixed incorrect arguments handling for `platformio serialports monitor <http://docs.platformio.org/en/latest/userguide/cmd_serialports.html#platformio-serialports-monitor>`_ command
   (`issue #248 <https://github.com/platformio/platformio/issues/248>`_)
 
diff --git a/platformio/__init__.py b/platformio/__init__.py
index d6303802..2dbb6b98 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -1,7 +1,7 @@
 # Copyright (C) Ivan Kravets <me@ikravets.com>
 # See LICENSE for details.
 
-VERSION = (2, 2, "1.dev1")
+VERSION = (2, 2, "1a0")
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"